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Rusoto is an AWS SDK for Rust.

Rusoto consists of one core crate, containing common functionality shared across services, and then a crate for each supported service.

Services are generated from the botocore project's API definitions.

Rusoto also provides a credential crate. The credential crate provides the necessary functionality for properly loading and handling AWS credentials.


If you are experiencing problems with rusoto, or would like clarification regarding something, please don't hesitate to contact us. You can reach us by opening an issue on the GitHub page for the project with the relevant information (code snippets and error messages are very helpful!). Alternatively, you can join us on the #rusoto channel on

Usage & Example

Rusoto provides a crate for each AWS service it supports, containing a client and all of the associated types for that service. A full list of these services can be found on the Supported AWS Services page.

It also provides a core crate called rusoto_core, containing all shared functionality across services, such as the list of regions, signed request senders, and credential loading.

Consult the rustdoc documentatation by running cargo doc or visiting the online API documentation for the latest release.

An example of using Rusoto's DynamoDB API to list the names of all the tables in a database:


name = "my-crate"
version = "0.1.0"
authors = ["My Name <>"]

rusoto_core = "0.35"
rusoto_dynamodb = "0.35"

Rust code:

extern crate rusoto_core;
extern crate rusoto_dynamodb;

use std::default::Default;

use rusoto_core::Region;
use rusoto_dynamodb::{DynamoDb, DynamoDbClient, ListTablesInput};

fn main() {
  let client = DynamoDbClient::new(Region::UsEast1);
  let list_tables_input: ListTablesInput = Default::default();

  match client.list_tables(list_tables_input).sync() {
    Ok(output) => {
      match output.table_names {
        Some(table_name_list) => {
          println!("Tables in database:");

          for table_name in table_name_list {
            println!("{}", table_name);
        None => println!("No tables in database!"),
    Err(error) => {
      println!("Error: {:?}", error);

Crates that extend Rusoto

Rusoto's current focus is to support all AWS services. This means higher level functionality present in other AWS SDKs are not currently available in Rusoto. See for more information on where Rusoto efforts are currently focused.

While Rusoto doesn't support various higher level functionality or better ergonomics, there are third party crates available that use Rusoto and provide this behavior.

A non-exhaustive list of projects that build on Rusoto to make it more ergonomic or provide higher level functionality:

  1. dynomite: make your rust types fit dynamodb and visa versa
  2. envy-store: deserialize AWS Parameter Store values into typesafe structs
  3. S4: Simpler Simple Storage Service for Rust

If you'd like to add an example to this list, please open an issue or pull request on the repo.

Supported AWS Services

Service Crate
Alexa for Business rusoto_alexaforbusiness
AppStream rusoto_appstream
Application Autoscaling rusoto_application_autoscaling
Application Discovery Service rusoto_discovery
Application Load Balancer rusoto_elbv2
API Gateway rusoto_apigateway
Athena rusoto_athena
Autoscaling rusoto_autoscaling
Batch rusoto_batch
Budgets rusoto_budgets
Certificate Manager rusoto_acm
Cloud Directory rusoto_clouddirectory
CloudFormation rusoto_cloudformation
CloudFront rusoto_cloudfront
CloudHSM rusoto_cloudhsm
CloudHSMv2 rusoto_cloudhsmv2
CloudSearch rusoto_cloudsearch
CloudSearch Domains rusoto_cloudsearchdomain
CloudTrail rusoto_cloudtrail
CloudWatch rusoto_cloudwatch
CloudWatch Events rusoto_events
CloudWatch Logs rusoto_logs
CodeBuild rusoto_codebuild
CodeCommit rusoto_codecommit
CodeDeploy rusoto_codedeploy
CodePipeline rusoto_codepipeline
CodeStar rusoto_codestar
Cognito Identity rusoto_cognito-identity
Cognito Identity Provider rusoto_cognito-identity
Cognito Sync rusoto_cognito_sync
Config rusoto_config
Cost and Usage Report rusoto_cur
Credential rusoto_credential
Database Migration Service rusoto_dms
DAX rusoto_dax
Data Pipeline rusoto_datapipeline
Device Farm rusoto_devicefarm
Direct Connect rusoto_directconnect
Directory Service rusoto_ds
DynamoDB rusoto_dynamodb
DynamoDB Streams rusoto_dynamodbstreams
EC2 rusoto_ec2
EC2 Container Registry rusoto_ecr
ECS rusoto_ecs
ElastiCache rusoto_elasticache
Elastic Beanstalk rusoto_elasticbeanstalk
Elastic File System rusoto_efs
Elastic Load Balancing rusoto_elb
Elastic MapReduce rusoto_emr
Elastic Transcoder rusoto_ets
IAM rusoto_iam
Import Export rusoto_importexport
Inspector rusoto_inspector
GameLift rusoto_gamelift
Glacier rusoto_glacier
Glue rusoto_glue
Greengrass rusoto_greengrass
Health APIs and Notifications rusoto_health
IoT rusoto_iot
Key Management Service rusoto_kms
Kinesis rusoto_kinesis
Kinesis Analytics rusoto_kinesisanalytics
Kinesis Firehose rusoto_firehose
Lambda rusoto_lambda
Lex Models rusoto_lex_models
Lex Runtime rusoto_lex_runtime
Lightsail rusoto_lightsail
Machine Learning rusoto_machinelearning
Marketplace Commerce Analytics rusoto_marketplacecommerceanalytics
Marketplace Entitlement Service rusoto_marketplace_entitlement
Marketplace Metering rusoto_meteringmarketplace
Mechanical Turk rusoto_mturk
Migration Hub rusoto_mgh
OpsWorks rusoto_opsworks
OpsWorks for Chef Automate rusoto_opsworkscm
Organizations rusoto_organizations
Polly rusoto_polly
Redshift rusoto_redshift
Rekognition rusoto_rekognition
Resource Groups Tagging rusoto_resourcegroupstaggingapi
RDS rusoto_rds
Route53 rusoto_route53
Route53 Domains rusoto_route53domains
S3 rusoto_s3
SDB rusoto_sdb
Service Catalog rusoto_servicecatalog
Shield rusoto_shield
Simple Email Service rusoto_ses
Simple Notification Service rusoto_sns
Simple Systems Manager rusoto_ssm
Secrets Manager rusoto_secretsmanager
Security Token Service rusoto_sts
Simple Workflow Service rusoto_swf
Serverless Repo rusoto_serverlessrepo
Server Migration Service rusoto_sms
Snowball rusoto_snowball
Step Functions rusoto_stepfunctions
Storage Gateway rusoto_storagegateway
SQS rusoto_sqs
Storage Gateway rusoto_storagegateway
Support rusoto_support
Web Application Firewall rusoto_waf
Web Application Firewall Regional rusoto_waf_regional
Workdocs rusoto_workdocs
WorkSpaces rusoto_workspaces
Xray rusoto_xray


Rusoto uses the log logging facade. For tests, Rusoto uses env_logger.

In order to see logging output (e.g. the actual requests made to AWS), env_logger needs to be initialized:

extern crate rusoto_core;
extern crate rusoto_s3;
extern crate env_logger;

use std::default::Default;

use rusoto_core::Region;
use rusoto_s3::{S3, S3Client, ListObjectsRequest};

fn main() {
    let _ = env_logger::try_init(); // This initializes the `env_logger`

    let bare_s3 = S3Client::new(Region::UsWest2);

    let mut list_request = ListObjectsRequest::default();
    list_request.bucket = "rusototester".to_string();
    let result = bare_s3.list_objects(list_request).sync().unwrap();
    println!("result is {:?}", result);

To see the output of logging from integration tests, the command needs to be run as follows:

RUST_LOG=rusoto,hyper=debug cargo test --features all

To get the logging output as well as the output of any println! statements, run:

RUST_LOG=rusoto,hyper=debug cargo test --features all -- --nocapture

If more debugging is required, all debug info including details from the compiler can be seen by setting RUST_LOG to debug. This will be noisy but will give a lot of debug information. For example:

RUST_LOG=debug cargo test --features all


Currently, performance isn't benchmarked.

To get the best runtime performance in a project using Rusoto, compile with the --release flag.

For example: cargo build --release

Increasing performance with large objects

As of Rusoto 0.36.0, we expose the http1_read_buf_exact_size setting in the hyper HTTP client. This can greatly improve performance dealing with payloads greater than 100MB. See for more information.

Example of increasing the buffer size from the default of 8KB to 2MB:

extern crate rusoto_core;
extern crate rusoto_ecs;

use rusoto_ecs::{Ecs, EcsClient, ListClustersRequest};
use rusoto_core::{Region, DefaultCredentialsProvider};
use rusoto_core::request::{HttpClient, HttpConfig};

fn main() {
    // EcsClient configuration demonstrates setting the hyper read_buf_size option
    // to 2MB:
    let cred_provider =  DefaultCredentialsProvider::new().unwrap();
    let mut http_config_with_bigger_buffer = HttpConfig::new();
    http_config_with_bigger_buffer.read_buf_size(1024 * 1024 * 2);
    let http_provider = HttpClient::new_with_config(http_config_with_bigger_buffer).unwrap();

    let ecs = EcsClient::new_with(http_provider, cred_provider, Region::UsEast1);

    match ecs.list_clusters(ListClustersRequest::default()).sync() {
        Ok(clusters) => {
            for arn in clusters.cluster_arns.unwrap_or(vec![]) {
                println!("arn -> {:?}", arn);
        Err(err) => {
            panic!("Error listing container instances {:#?}", err);

Potential runtime performance improvements


Rusoto 0.31.0 to 0.32.0

With async support, the easiest migration is to use the new simple() constructor on clients and add .sync() to the function calls.

Rusoto 0.31.0:

extern crate rusoto_core;
extern crate rusoto_polly;

use rusoto_polly::{Polly, PollyClient, DescribeVoicesInput};
use rusoto_core::{DefaultCredentialsProvider, Region, default_tls_client};

let credentials = DefaultCredentialsProvider::new().unwrap();
let client = PollyClient::new(default_tls_client().unwrap(), credentials, Region::UsEast1);
let request = DescribeVoicesInput::default();

println!("{:?}", client.describe_voices(&request).unwrap());

Rusoto 0.32.0 with async:

extern crate rusoto_core;
extern crate rusoto_polly;

use rusoto_polly::{Polly, PollyClient, DescribeVoicesInput};
use rusoto_core::Region;

let client = PollyClient::simple(Region::UsEast1);
let request = DescribeVoicesInput::default();

println!("{:?}", client.describe_voices(&request).sync().unwrap());


  • DefaultCredentialsProvider isn't required with the ::simple() constructor
  • default_tls_client isn't required with the ::simple() constructor
  • .sync() is called on the result from describe_voices. This blocks until the call is finished.

Rusoto 0.24.0 to 0.25.0 or later

As of Rusoto 0.25.0, the Rusoto crate is now deprecated. This decision was made because the single crate implementing all AWS services was too large to compile, especially on TravisCI and Appveyor. The new main crate is rusoto_core and all services now have their own crate.

To continue implementing new services and reducing compilation times, we've extracted a few core crates and every AWS service we support now has its own crate.

rusoto_core now contains the core functionality of Rusoto: AWS signature handling, regions, requests to services and XML helpers.

rusoto_mock was also extracted. Crate users shouldn't need this: it's for developing on Rusoto itself.

rusoto_credential remains its own crate, providing AWS credential sourcing. If you're working on something that uses AWS and Rusoto doesn't support it, you can use that crate instead of rolling your own AWS credential providers.

The new service crates depend on rusoto_core.

Required changes

Previously, to bring in a Rusoto implementation of an AWS service, you'd specify something like this in your Cargo.toml file:

rusoto = {version = "0.24", features = ["rds"]}

Now, you'd bring in services like this:

rusoto_core = {version = "0.25.0"}
rusoto_rds = {version = "0.25.0"}

Once the new crates have been brought in, use the new crates in your code. A sample before:

extern crate rusoto;

use rusoto::rds::{RdsClient, CreateDBInstanceMessage, DescribeDBInstancesMessage};
use rusoto::{DefaultCredentialsProvider, Region, default_tls_client};

And after:

extern crate rusoto_core;
extern crate rusoto_rds;
use rusoto_rds::{Rds, RdsClient, CreateDBInstanceMessage, DescribeDBInstancesMessage};
use rusoto_core::{DefaultCredentialsProvider, Region, default_tls_client};

Note there are now two crates required: rusoto_core as well as the RDS crate, rusoto_rds. There's also a new trait for each service. In this case it's Rds and we bring that in. This is used to make calls to services easier to test and improve ergonomics of using Rusoto clients.

Credential timeouts

If AWS credentials aren't found locally, Rusoto attempts to query the ECS container role provider, then the EC2 Instance Profile provider. When running locally, such as in a command line tool, timing out waiting for those services can take 30 seconds or more.

To improve responsiveness of credential sourcing, timeouts can be provided to the credential provider. This example uses a 200ms timeout:

extern crate rusoto_core;
extern crate rusoto_s3;

use rusoto_core::credential::ChainProvider;
use rusoto_core::request::HttpClient;
use rusoto_core::Region;
use rusoto_s3::{S3, S3Client};
use std::time::{Duration, Instant};

fn main() {
    let mut chain = ChainProvider::new();
    let s3client = S3Client::new_with(
        HttpClient::new().expect("failed to create request dispatcher"),

    let start = Instant::now();
    println!("Starting up at {:?}", start);

    match s3client.list_buckets().sync() {
        Err(e) => println!("Error listing buckets: {}", e),
        Ok(buckets) => println!("Buckets found: {:?}", buckets),
    println!("Took {:?}", Instant::now().duration_since(start));

Now, if Rusoto can't find any credentials within 200ms, it will return an error like this:

Error listing buckets: Couldn't find AWS credentials in environment, credentials file, or IAM role.

Last updated for Rusoto 0.34.0 with rusoto_credential 0.13.0.